Exercise 9B
Question 1
1. A school library has 600 books out of which 540 books are fiction. What per cent of the books are fiction?
2. There are 24 girls in a class of 40 children. What percentage of children were girls?
3. Nikhil bought 5400 books in a month and sold 4050 books. What per cent of books he could not sell?
4.An author receives royalty at $7 \frac{1}{2} \%$ of the selling price of the the first 5000 books; $10 \%$ of the selling price on the next 5,000 books; $12 \frac{1}{2} \%$ of the selling price on the rest of the sales. How much will he receive if 15,000 copies are sold at $₹ 80$ each?
5.A Maruti car costing $₹ 2,50,000$ dropped $23 \%$ in value of the first year. How much was it worth at the end of the year?
6. A 4 metre elastic band is increased by $10 \%$. Find its new length.
7. The cost of a shirt is decreased by $12 \frac{1}{2} \%$ during sale. What is the new cost if it was 1500 rupees?
8. A library contains 800 reference books. New books are bought and the percentage increase in the number of books is $30 \%$. How many books are there in the library now?
9. The price of an egg is increased from $₹ 4$ to $₹ 5$. What is the percentage increase?
10. An article was marked $₹ 150$. Ali wants to purchase it for $₹ 138$. How many per cent discount did Ali ask for?
11. Chalk contains $40 \%$ calcium, $12 \%$ carbon and rest oxygen. What is the amount oxygen in 8 kg of chalk?
12. There are 160 apples in a box. $15 \%$ of the apples got spoilt on them. How many good apples are there in the box?
13. A man spent $25 \%$ of his money on food, $55 \%$ on rent and transportation and the remaining 9000 , he saved. How much money did he have? Find the amount of money spent on rent and transportation?
14. In an examination, there were 640 boys and 360 girls. $60 \%$ of the boys and $80 \%$ of the girls were successful. How many in all failed?
Multiple Choice Question (MCQ)
Tick (✔) the correct option.
15. A batsman scored 140 runs which included 2 boundaries and 8 sixes. What per cent of his total score did he make by running between the wickets?
(a) $56 \%$
(b) $60 \%$
(c) $44 \%$
(d) $40 \%$
Solutions
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